Disney Princess: Merida Series by Sudipta Bardhan-Quallen

Merida loves archery, but she has never had a friend who can shoot as well as she can... untilnow. She's thrilled to welcome her visitor, Cat, to Castle DunBroch. The only problem is that her new friend is also great at seweing, singing, and everything Merida is not! But when a dark force tries to harness the magic from te Highlands, Merida must set aside her jealousy and help Cat - and follow her fate.

Merida would rather not play host to the arrogant young son of her father's ally Lord Macintosh. But when a hasty wish comes true, things get even worse! Now Merida has to coax Young Macintosh on an adventure to reverse the magic and bring back his memories. It's not easy to get someone climb the Crone's Tooth and drink from the Fire Falls... especially when he cannot even remember who he is.